Non‐Ionic Water‐Soluble Crown‐Ether‐Substituted Polyfluorene as Fluorescent Probe for Lead Ion Assays

descriptionPublicationkeyboard_double_arrow_right Article 14 Jun 2007 English Publisher:WileyJournal:Macromolecular Rapid Communications, volume 28, pages 1,333-1,338 (issn: 1022-1336, eissn: 1521-3927,

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Authors: Minghui Yu; Fang He; Yanli Tang; Shu Wang; Yuliang Li; Daoben Zhu;

doi: 10.1002/marc.200700187

Non‐Ionic Water‐Soluble Crown‐Ether‐Substituted Polyfluorene as Fluorescent Probe for Lead Ion Assays

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Abstract

AbstractA new non‐ionic water‐soluble polyfluorene that contains two benzo‐18‐crown‐6 side chains per repeat unit (PFDC) is synthesized and characterized. Upon addition of Pb2+ ions to a solution of PFDC, the PFDC fluorescence is strongly quenched. The minor interference from other metal ions, especial from Cu2+ and Hg2+ions, clearly shows that the PFDC can be used to detect Pb2+ ions with high selectivity. The fluorescence quenching of PFDC in solution originates from the multivalent coordination of the crown‐ether moieties to Pb2+ ions followed by precipitation. In comparison to ionic conjugated polymers, the pH of the medium shows less effect on the binding of non‐ionic PFDC to Pb2+ ions.magnified image

Related Organizations

Beijing National Laboratory for Molecular Sciences
China (People's Republic of)
Chinese Academy of Sciences
China (People's Republic of)
Institute of Chemistry
China (People's Republic of)

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